profitable store的用法和樣例：
例句
- There is no system or strategy that will turn a novice or losing trader into a consistently profitable one.
沒有什麼系統或策略可以讓一個新手或失敗的交易者變成持續贏利的交易員。 - When we met a week later he reported that he had four profitable days out of five and was profitable overall.
一周以後，當我們再次碰面時，他報告說他在五天中已經有四天贏利，並且總體是贏利的。
